Not accepting defeats and being aggressive to recover back your losses the quickest as possible is something that gambler mostly committed as mistake, with that mentality instead of only losing allocated amount they tend to push forward as emotions really controlled their decision making, like what you said, it's better to quit when you already lose the amount that you deposit and take the fun side of it and let go as there's still another day for you to re-try and playback with much clear mindset.
It is true that I often meet gamblers like that when they lose they are very aggressive and cannot accept defeat just like that, gamblers like that are very difficult to advise, it takes a very long process to be able to eliminate such an arrogant attitude. Maybe because of the desire to win, the gambler is very aggressive when he loses and there are also those who cannot control themselves when they lose, they should stop for a moment but continue to pursue victory or take revenge for their defeat by gambling continuously.